sutherland



4 Sheets-Sheet 1.

(No Model.)

H. SUTHBPULAND.

QUARTZ CRUSHES 0B. MILL. No. 800,529. Patented June 1'7, 1884.

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(No Model.) 4 Sheets-Sheet 2. H. SUTEERLAND.

QUARTZ GRUSHER OR MILL. No. 300,529. Patented June 17, 1884.

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(No Model.) 4 Sheets-Sheet 3.

H. SUTHERLAND.

QUARTZ GRUSHER 0R MILL.

Patented June '17, 1884.

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(No Model.)

4 Sheets-Sheet 4.

H. SUTHERLAND.

QUARTZ GRUSHER OR. MILL.

Patented June 17, 1884.

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Unrrnn STATES Parent Orrron.

HORATIO SUTHERLAND, OF LONDON, ENGLAND.

QUARTZ CRUSHER OR NllLL.

SPECIFICATION forming part of Letters Patent No. 300,529, dated June 17,1884.

Application filed October 29, 1888. No model.) Patented in England June8, 1883, No. 2,807; in France October 22, 1883, No. 158,1(2; in BelgiumOctober 22, 1883, No. 62,944; in Victoria November 1, 1883, No. 3, 585;in New South Wales January 16, 1884, No. 308; in Queensland January 17,1884, No. 561, and in New Zoaland January, 1881.

To ctZZ 2072 0127. it may concern..-

Be itknown that I, HORATIO SUTHERLAND, a subject of the Queen of GreatBritain, residing at 66 Holborn Viaduct, in the city of London, England,have invented an improved quartz crusher or mill to be used for crushingand pulverizing quartz and other minerals and materials, (for which Ihave received Letters Patentin Great Britain, No. 2,867, dated June 8,1883; in France, No. 158,163, dated Octoher 22, 1883: in Belgium, No.62,944, dated October 22, 1883; in Victoria, No. 3,585, dated November1, 1883 in Queensland, No. 561, dated January 17, 1884.; in New South"Wales, No. 308, dated January 16, 1884, and in New Zealand aboutJanuary, 1884, and which will expire with the above-recited patentgranted in Great Britain June 8, 1888,) of which the following is aspecification.

This invention has for its obj set an improved quartz crusher or mill tobe used for crushing and pulverizing quartz and other minerals andmaterials.

Theimprovcd crusher or mill consists of two main parts-one a cast-metalblock with a cavity in it in form like a mortar, and the other anothercast block like a pestle. The latter is contained within the former, andnearly fits it, except as hereinafter stated. The first block or mortaris stationary, and an axis passing up through its center and driven bywater or steam power or in any convenient manner carries the pestle orsecond block, which is rotated concentrically within the mortar. Theupper parts of the two blocks are corrugated where their surfaces areopposed, and the corrugations, which may be either vertical or inclined,are formed upon rings which are capabio of being removed, in order thatthe rings may be replaced by others when they become worn. Thecorrugations are large at the upper parts of the rings, where thematerial fed into the crusher or mill first comes into contact withthem, but become smaller as they descend. Intermediate corrugations areintroduced into the spaces then left between the main corrugations.There is a space or interval between the blocks of about the same depthas the rings, and this is about half the height of the inner block. Thisspace or interval is comparatively wide all around at the top where thematerial enters, and becomes narrower in descending, tapering away tonothing at the lower edges of the rings. Below this the innor block fitsto the outer, except at the bottom around the axis. Here the inner blockis recessed to leave a cavity, and the outer block is perforated withpassages communicating with the cavity. By these passages the quartz ormaterial when reduced sufliciently small passes out of the apparatus. Anumber of indentations may also be formed on the lower part of the innerblock. These are useful where the material to be treated contains hardand soft portions, as the hard material becomes embedded in theindentations and aids in reducing the other and softer parts. The axisis supported at the bottom upon a spring, and is set down at the top byan adjustable screw-pivot. The upper block can thus be confined more orless closely against the lower block, according to the degree offineness to which it is desired that the materials should be reduced.

In order that my said invention may be most fully understood and readilycarried into effect, I will proceed to describe the drawings hereuntoannexed.

for convenience of transport, be cast in two pieces, to meet and bebolted together about on the line A B in Fig. 3; or (as these drawingsrepresent) the principal casting may be all of a piece. The part Areceives within it a chilled cast-iron or steel ring, a, so formed thatit will drop freely into its place. It is prevented, however, fromrotating within the main casting by ribs upon the one part,which enterand engage with grooves on the other.

Upon the interior of the ring a ridges or corrugations are provided.These, .as they appear at the upper part of the ring, are seen in Fig.2. As they are continued downward the corrugations taper away, and atthelower edge of the ring they disappear, the ring a on its lower edgebeing truly circular within. Between these main corrugations othersecondary corrugations are introduced. They rise gradually from thehollows between the main corrugations, and extend from the middle of thering to its lower edge. They are similar in form to the lower parts ofthe main corrugations, and occupy positions midway between them. Whenthe ring a becomes worn, it can readily be removed and replaced byanewring with little loss of time and at a small cost.

a, a are holes. They are formed at the base of a rising part orprojection in the center of the bottom of the part A, where the pestlepart B does not closely fit. The ground or reduced quartz or materialpasses out from the apparatus by these holes a, and may be in some casesaided in doing so by a stream of water introduced at the top between theparts A and B. The pestle or part B is cast with a passage through it,into which the vertical shaft D is received. It is fixed firmly uponthis shaft, which for a portion of its length is square. The part B isprovided with a ring, 1), similar to the ring a, but with exteriorcorrugations. This ring also, when it becomes worn, is intended to beremoved and replaced by a new ring. The shaft D passes by a circularhole through the bottom of the part A, and is stepped into acup-bearing,which is carried upon the top of the spring E. I The springE is sufficiently strong to sustain the shaft D and the parts upon it insuch'a position that the part B does not rest by its Weight upon thepart A; but the shaft can be set down to any extent desired by a screw,F, passing through a cross-bar which connects the standards 0 C. Thescrew bears upon the top of the shaft D, and by means of it theapparatus may be set to obtain any desired degree of reduction of thequartz or material, passed through.

G is another cross-bar of the frame, on which there is a bearing tosupport the shaft D.

H is a beveled wheel upon the shaft near its upper end.

I is a beveled pinion, in gear with the wheel H. It is fixed upon thehorizontal axis K,and

this is carried by the frame in themanner in-' dicated. On the axis Kalso are pulleys K K, to receive a driving-belt. By. this belt power istransmitted to the machine from any convenient motor, the axis K beingmade to rotate, say, at a speed of three hundred revolutions in theminute.

L is a fly-wheel upon the axis K. A shield, M, (seen in Fig. 3,) isprovided. It covers the part. B, and is inclined in such manner as todirect the material thrown upon it, and which has previously beenreduced to pieces of a suitable size, into the space between the maincrushing parts of the mechanism.

N is a stationary covering-ring, to prevent portions of the materialfrom being projected out from between the crushing parts.

Sometimes I provide in the lower parts of the castings A and B smallcavities of any convenient form, into which hard portions of thematerial may embed themselves, and so aid in the reduction of softerparts.

I claim as my invention 1. The combination of the mortar provided withcorrugations at its upper part, and uncorrugated at and near its lowerpart, and the concentrically-revolving pestle provided with corrugationsopposite those of the mortar, and uncorrugated at its lower part, whereit is adapted to fit closely within the mortar, sub stantially as andfor the purpose hereinbefore set forth. i

2. The combination of the mortar uncorrugated at its lower part, thecorrugated ring within its upper part, the pestle uncorrugated atitslower part and adapted to fit within the corresponding part of themortar, and the corrugated ring about the upper part of. the pestle,substantially as and for the purpose hereinbefore set forth.

3. The combination of the mortar having the discharge-openings a in itsbottom, the driving-shaft, and the rotating pestle fitting withinthemortar. at its lower part, except about the driving-shaft, where arecess is provided which communicates with the dischargeopenings, as andfor the purpose described.

HORA'IIO SUTHERLAND.

Witnesses:

J OHN DEAN, HERBERT E. DALE, Both of 17 Gracechurch Street, London.

